E. On September 30, 2016, Bricker Enterprises purchased a machine for $200,000. The estimated service life is 10 years with a $20,000 residual value. Bricker records partial-year depreciation based on the number of months in service. Calculate depreciation for 2016 F. On March 31, 2016, M. Blackstone purchased the right to remove gravel from an old rock quarry. The gravel is to be sold as roadbed for highway construction. The cost of the quarry rights was $164,000, with estimated salable rock of 20,000 tons. During 2016, Blackstone loaded and sold 4,000 tons of rock and estimated that 16,000 tons remained at December 31, 2016. At January 1, 2017, Blackstone estimated that 20,000 tons still remained. During 2017, Blackstone loaded and sold 8,000 tons. Calculate Blackstones depletion for 2016.